Drill-sharpening mechanism



Feb. 9 1926. I 1,572,729

v F. M. LEE

DRILL SHARPENING MECHANI SM Filed Feb. 1, 1923 Patented Feb. 9, 1926.

UNITED STATES 1,572,729 PATENT OFFICE.

FRANK M. LEE, OF CHICAGO, ILLINOIS, ASSIGNOR TO SULLIVAN MACHINERY COM- PANY, A CORPORATION OF MASSACHUSETTS.

DRILL-SHARPENING MECHANISM.

Application filed February 1, 1922. Serial at. 616,432; 1

To all whom it may concern:

Be it known that I, FRANK M. LEE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Drill-Sharpening Mechanisms, of which the following is a full, clear and exact specification.

My invention relates to drill sharpening 1 mechanisms and more particularly to mechanisms for opening the holes through which cleansing fluid is conducted in drill steels.

An object of my invention is to provide an improved punching mechanism. An-

other object of my invention is to provide an improved pinning out mechanism for use in opening partially or wholly closed cleansing fluid conducting passages in newly formed or sharpened drill steels. A further object of my invention is to provide improved means permitting the ready adaptation of an ordinary percussive motor to use as the actuator for a pinning out tool. Other objects and advantages of my invention will hereinafter more fully'appear.

In the accompanying drawings I have shown for purposes ofillustration one form which my invention may assume in practice.

In these drawings,

Fig. 1 is a side elevation of the illustrative embodiment of my invention.

, Fig. 2 is a central vertical section with parts shown in elevation.

Fig. 3 is a section on an enlarged scale showing a detail of construction In the form of my invention which I have shown for purposes of illustration, I have shown at 1 the supporting frame of a hole opening punching mechanism. Clamped to this frame by bolts 2 is a guide member 3 which is provided herein with a cylindrical bore t extending throughout its length, although it will be understood that for various shapes of drilling tools various shapes of bores may be necessary. Secured to and herein shown as cast integral with the base 1 is a valve housing 5 in whose chamber 6 a valve 7 is rotatable. The valve 7 is provided with an arcuate groove 8 which is adapted alternatively to connect ports 9 and 10 or to interrupt communication be tween them. Slidable longitudinally within the bore 4 is a percussive drilling motor 11 which is diagrammatically shown in the form of a well known type of valveless motor. This motor is herein cylindrical in cross section. and snugly fits the bore 4. At the rear end of the motor 11 a head member 12 is provided which serves the double function of limiting the forward movement of the motor and providing a motive fluid'connection 13. The motive fluid connection 13 is connected by a flexible tube 14 with {the port10 while the fluid supply passage 15 G5 .is connected with the passage 9. Suitably clamped to the front end of the motor 11 is a collar member 16 herein in the form of a split collar adapted to be clamped by a bolt and nut connection 17. This collar is provided at its lower side with a recess. 18 which cooperates with a handle 19 suitably secured to the valve 7. The collar 16 is spaced a substantial distance from the front end of the sleeve member 3 and between the 7 latter and the collar a spring 20 of'substantial strength is provided. Suitable tie rods 21 and springs 22 hold a drill steel retainer 23 inoperative relation to the collar 16 and within the yoke 24 of the drill steel retainer a spring 25 is arranged between the yoke and a collar 26' formed on a pinning out tool 26 to resiliently absorb the forward movements of the pinning out tool '26 in case the latter is not in engagement with the work, but to permitthe full force of the blow to be utilized in normal operation. A hollow drill steel is shown at 27.

a From the foregoing description the mode of operation of this invention will be very clearly apparent. WVhen it is desired to open the bore in a drill steel, the steel is brought into engagement with the pinning out tool 26 and upon the application of longitudinal force to the latter, the same is moved to theright in Figs. 1 and 2, moving with it the motor 11 and compressing the spring 20. As the collar 16 moves to the right with the motor 11, the notch .18 acting upon the handle 19 swings the valve 7 to a position to conduct air by way of the groove 8 from the port 9 to the port 10 and so by way of the tube 14: to the motor 11. Ac

cordingly, pressing upon the pinning out tool 26 starts the motor. As soon as the hole has been opened to the requisite amount and the steel withdrawn, the spring 20 will immediately, acting upon the collar 16, cause the latter to move the motor 11 toward the left and as the collar 16 moves toward CII the left the handle19 will be swung to, the position shown in Fig. 3 and the supply of air to the motor 11 discontinued.

It will be evident from the foregoing discussion that I have provided a very simple mechanism by means of which an ordinary percussive motor may beemployed as 'a pinning out tool actuator. It will, moreover, be evident that I have provided a very simple construction ,bymeans of which it. is possible to "start and stop the pinning out tool actuating motor at appropriate'times. [t will further be evident that I have provided improvedtool retaining means which permits the actuation of the pinning out tool 26 Without loss of power during actual hole operating work but which'also is adapted'to cushion the action of the hammer and prevent breakingof the parts in case the motor should be started in any way while the pinning out tool was not actually in engagement with the work. It will be understood that this contingency is one which will. not frequently arise with a mechanism constructed as shown herein, but accidental'initi'alengagement, for example, of, a steel with the retainer 24: to'an extent sufficient to start the motor will, with my improved tool retainer construction result neither in breakage nor in possible injury to the blacksmith by a flying pin.

lVhile I have in this application specifically described one'formwhich my invention may assume in practice, it will be underjst ood that this form'of the same is "shown for purposes of illustrationand that. the in vention may be modified and embodiedin various other formswithout departing from its spirit or the scope of the appended claims.

\Vh'at I claim as new and desire to secure by Letters Patent is:

'1. In a punchlng mechanism, a stationary support, a punching motor slidablerelative thereto and provided with a collar, and a spring surrounding the body of said "motor and engaging said support and collar respectively for maintaining said'motor in its normal inoperative position.

I 2. In a punching mechanism, a stationary support, a punching motor slidable relative thereto and provided with a collar, and a spring surrounding'the body of said'motor and engaging said support and collarrespectively for maintaining said motorin its normal inoperative position, and means operated upon movement ofsaid motor for starting the latter.

,3. In a punching mechanism, a' stationary support, a punching motor slidable relative thereto and'provided' with a collar, a spring surrounding the body of said motor and'en- 'gaging said support and collar respectively for maintaining saidmotor in its normal forward inoperative position, and means operative upon reverse movement of said motor for starting the latter, said means being automatically rendered inoperative as the motor moves forwardly.

4. In aipunching mechanism, a stationary support, a punching motor slidable relative thereto, and controlling means carried directly by said support and operatively connected tos'aid motor-for automatically starting said motor when the latter is moved rearwa-rdly and for automaticallystopping said motor as the latter moves forwardly.

In apunching mechanism, a stationary support, a punching motor slidable relative thereto and having longitudinal spaced collars, anda spring surrounding thebody'of said motorand engaging one of said collars and said support respectively for maintaining said motor in its normal inoperative posiposition with the other collar engagingsaid support,-and means associated with one of said collars for starting and stopping said motor.

r. In a punching mechan sm, a support, a motor slidable relative thereto" and provldedw th .a collar, a Valve carried by said support and operated by'movementof said collar to operate said motor, and tool retainin'g means pivotallyconnected to said collar.

I 8. In a punchingmechanism, astationary support, a fluid actuated'motorcarriedby said support and provided with a collar, and a'controlling valve carried directly'by said support and operated by movement of said collar r'elative'to'said'support'to start said motor. 7

9. Ina punching mechanism, a stationary support, a motor carried "by said support provided with a collar, and a valve carried 'by said support 1 and operated by movement of said collar relative to said support to start or stop said motor.

10. In 'ap'unching mechanism, a stationary support, a fluid actuated punching motor slidable relative thereto adapted to actuatea pinning tool, m'ea'nsfor starting and stopping said motor including a controlling valve carried directly by said support and operated by movement of said motor, and means for automatically stopping said motor when'the work is removed from said tool.

.11. In apunching mechanism, a base, a guide thereon, a vpercussive motor hIEClprooable in said guide, means fornorma'lly holding said motor in extreme forward position in said guide including a spring and an abutment surrounding said motor, and means including a pivoted lever controlled by said spring controlling the fluid supply to said motor.

12. In a punching mechanism, a stationary support, a punching motor slidable longitudinally relative thereto and adapted to be actuated by the work, a collar surrounding said motor, a spring surrounding the body of said motor and disposed between said collar and said support for maintaining said motor in its forward inoperative posiion, means associated with said collar for starting said motor when the same is moved rearwardly, and means for automatically rendering said motor inoperative when the work is removed therefron r 13. In a punching mechanism, a stationary support, a fluid actuated punching motor slidable relative thereto, a valve carried directly by said support and operatively connected to said motor, said valve being operable to start said motor when the latter is moved in one direction and to stop said motor when the latter is moved in an opposite direction.

14:. In a punching mechanism, a stationary support, a. fluid actuated punching motor slidable relative thereto, a valve carried directly by said support, said valve being operative to start said motor when the latteris moved in one direction, and means associated with said motor for automatically moving the same in an opposite direction and for stopping said motor.

15. In a punching mechanism, a stationary support, a fluid actuated punching mo tor slidable relative thereto, a valve carried directly by said support, connections between said valve and motor for operating said valve to start and stop said motor upon movement of the latter, and a fluid connection between said valve and said motor for conducting motive fluid to the latter.

16. In a punching mechanism, a stationary support, a punching motor slidable relative thereto, and controlling means therefor carried directly by said support and having operative connections with the forward end of said motor whereby the movement of said motor operates said means to start and stop said motor.

17. In a punching mechanism, a stationary support, a punching motor siidable relative thereto, and controlling means therefor carried directly by said support and operated by movement of said motor;

In testimony whereof I afiix my signature.

FRANK M. LEE. 

